Comparison

Astrospheric vs Sunbeam

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Astrospheric

This app offers advanced weather forecasting and astronomical data for stargazers and astrophotographers. It provides detailed hourly forecasts, cloud and sky transparency reports, and alerts for celestial events. It also includes tools for astronomical societies and offline site setup.

Highlights
  • 84-hour hourly weather forecast
  • Ensemble cloud forecast
  • Kp index for Aurora
  • ISS flyover paths
  • Integrated smoke forecast
  • Sky and ground data
  • Rise and set times
  • Solar and Lunar eclipse data
Features
Read full description

Astrospheric provides advanced weather tools for professional astronomers and astrophotographers, and supports hundreds of astronomical societies with tools that help members stay connected. Are you using what the pros use? Features • 84 hour, hour-by-hour forecast • Free notification reminders for major astronomical events • Ensemble cloud forecast lets you quickly compare the major forecast models with hourly updates (Astrospheric Pro) • Extended cloud forecast • Kp index for Aurora viewing (and alerts with Pro) • International Space Station (ISS) flyover paths and times • Astrospheric is the only astronomy service that integrates the smoke forecast into the transparency report • Sky data: cloud, sky transparency, seeing • Ground data: wind, temperature, and humidity • Precise rise and set times for both the sun and moon • Get weather alerts when conditions meeting your requirements are met (Astrospheric Pro) • Details Solar and Lunar eclipse data Astronomical Societies • Stay connected with chat, image sharing, and event planning with all of your members. • Qualifying astronomical societies can get Pro features for all of their members Site Mode • Information necessary to quickly set up your GOTO tracking mount • Available even if you don’t have a network connection Astrospheric Professional is now available to enable Weather Alerts, Ensemble cloud forecast, and more! • Astrospheric Professional is billed monthly or yearly and will auto-renew unless turned off at least 24-hours before the end of the current subscription period. The renewal cost will be the same as the initial sign-up cost of the subscription. Any changes in cost will be communicated before renewal takes place. • Payment will be charged to iTunes Account at confirmation of purchase • Subscriptions may be managed by you and auto-renewal may be turned off by going to the your Account Settings after purchase. A link to these settings is made available within Astrospheric "My Profile" for easy access. • The terms of use and privacy policy may be found at https://www.astrospheric.com/privacypolicy.php, purchasing a subscription shows agreement to these terms. PLEASE NOTE: Weather data is not available for Hawaii due to the domain area covered by the Canadian Meteorological Center. However, satellite and light pollution map layers, as well as other features will work in Hawaii. More information on Astrospherics forecast domain can be found here: https://www.astrospheric.com/dynamiccontent/datadomain.html

About

Sunbeam

This app provides real-time UV Index forecasts and personalized sun exposure tracking. It helps users avoid sunburn, monitor time spent in daylight, and estimate Vitamin D levels. Features include widgets, Apple Watch integration, and Apple Health syncing.

Highlights
  • Worldwide UV Index forecasts
  • Lock Screen and Home Screen widgets
  • Apple Watch app with complications
  • Apple Health integration
  • Personalized sunburn risk tracking
  • Live Activities for Lock Screen
  • Extended 10-day UV forecasts
Features
Read full description

Stay safe in the sun with accurate UV forecasts, personalized exposure insights, and smart tools for Time in Daylight and Vitamin D across iPhone and Apple Watch. Trusted by thousands worldwide, Sunbeam helps you know when UV levels are high, reduce your risk of sunburn, and make more confident decisions about time outdoors. Check the UV Index in seconds, track your sun exposure, and better understand how sunlight fits into your health and daily routine. Why people choose Sunbeam: - Know when to protect your skin: See accurate UV forecasts for your current location or anywhere you travel. - Reduce your risk of sunburn: Understand when UV levels are high and track your personalized sunburn risk over time. - Understand your sun exposure: Monitor Time in Daylight, Vitamin D, and exposure history with simple, useful insights. - Plan outdoor time more easily: View hourly UV forecasts for the next 10 days across your favorite locations around the world. - Beautiful widgets: Check UV forecasts, Vitamin D, and Time in Daylight right on your Home Screen or Lock Screen. - Live Activities: Track sun exposure sessions in real time from your Lock Screen and Dynamic Island. - Full Apple Watch support: Use the Apple Watch app and complications to stay informed in the sun wherever you are. - Siri and Shortcuts support: Check the UV, start an exposure session, view your sun exposure, and more with best-in-class iOS integrations. - Make your health data more useful: Sync Time in Daylight and Vitamin D with Apple Health. - Choose a privacy-first app: Your data stays yours. Sunbeam never sells your data or uses it for targeted ads. Whether you want to protect your skin, spend more time outdoors with confidence, or build a better understanding of your daily sunlight exposure, Sunbeam helps you make smarter decisions in the sun. Certain features require a Sunbeam Pro subscription. ========================= If you purchase a Sunbeam Pro subscription, payment will be charged to your Apple ID Account. You will be automatically charged for renewal unless auto-renew is turned off at least 24 hours before the end of the current subscription period. You can turn off auto-renew at any time by going to your Account Settings on the App Store after purchase. All purchases are final and refunds will not be provided for any unused portion of the term. Privacy Policy: https://richardj.org/sunbeam/privacy-policy/ Terms and Conditions: https://richardj.org/sunbeam/terms-and-conditions/ =========================

Screenshots

Astrospheric4 screens
Sunbeam4 screens

Verdict

The call

Astrospheric and Sunbeam both sit at 4.8 stars, but that hides the real split: 88% of Astrospheric's written reviews are positive against 70% of Sunbeam's. Astrospheric also leads on chart position (#88 vs unranked) and iOS requirement (9.1 vs 18.0). Sunbeam's advantage is ratings volume (1.7K vs 453). On price, rating, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Astrospheric sells 2 in-app purchases, starting at $2.99 per month and Sunbeam sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Astrospheric against 4.7 for Sunbeam. Both are backed by a comparable volume of ratings — 453 and 1.7K respectively. Written reviews are what separate them: 88% of Astrospheric's written reviews are positive against 70% of Sunbeam's.

UpkeepUpdate frequency

Astrospheric ships an update every 3 weeks, Sunbeam every 4 weeks. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

Scorecard4 real differences · 7 level
Astrospheric versus Sunbeam: the parameters behind the verdict, then further details
ParameterAstrosphericSunbeam
PriceFreeFree
Rating4.8 (453 ratings) — better4.7 (1.7K ratings)
Positive reviews87.7% of reviews — better70.1% of reviews
Number of ratings4531.7K — better
Update frequencyEvery 3 weeks — betterEvery 4 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
Best chart rank#88 — better—
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS9.1 — better18.0
Further details — not scored
Size47 MB113 MB
Age rating4+4+
DeveloperDaniel FiordalisElectric Acorn Ltd

Customer experience

Astrospheric

All ratings453 ratings
Positive94.5%
Neutral1.5%
Negative4.0%
Written reviews146 reviews
Positive87.7%
Neutral4.8%
Negative7.5%

Sunbeam

All ratings1,689 ratings
Positive92.9%
Neutral3.1%
Negative4.0%
Written reviews107 reviews
Positive70.1%
Neutral9.3%
Negative20.6%

User reviews

Astrospheric

From 453 App Store ratings

What we love

  • 🚀 Precision tool for astrophotography
  • 🔍 Detailed weather forecasts
  • ⭐ Accurate and reliable
  • 💻 Comprehensive data and features
  • 📊 Helpful for planning observing sessions

Room to improve

  • 🐛 Occasional inaccurate forecasts
  • 🔍 Missing some weather data (e.g. wind)
  • 💰 Subscription required for full functionality
  • 🔌 Compatibility issues on some devices

Sunbeam

From 1.7K App Store ratings

What we love

  • 🚀 Accurate UV tracking
  • 👍 Helpful for planning sun exposure
  • 🌞 Useful for tanning and vitamin D generation
  • 🔒 Respects user privacy
  • 📊 Provides detailed hourly and daily UV forecasts

Room to improve

  • 💰 Many features locked behind paywall
  • 🐛 Occasional bugs and connectivity issues
  • 📍 Difficulty setting custom location
  • 🔋 High battery consumption for some users

Bugs and requests

Astrospheric

Reported bugs

2 issues
  • App crashing or not loading on some devices
  • Inconsistent temperature and wind data

Requested features

4 requests
  • Notification system for clear skies
  • Widgets for quick access to data
  • More detailed transparency and seeing data
  • Ability to flip east and west in the app

Sunbeam

Reported bugs

3 issues
  • Widget not working for some users
  • UV data not updating correctly in certain locations
  • Vitamin D tab not functioning as expected

Requested features

4 requests
  • Integration with Apple Health for better vitamin D tracking
  • Customizable sun exposure timers and alarms
  • Historical data and exposure tracking
  • More detailed skin type and sunscreen recommendations

In-app purchases

2 purchases

Astrospheric

Subscriptions2
  • Astrospheric Pro Subscription7 Days trial$2.991 Month
  • Astrospheric Pro Subscription7 Days trial$29.991 Year
2 purchases

Sunbeam

Subscriptions2
  • Sunbeam Pro Monthly$4.991 Month
  • Sunbeam Pro Annual7 Days trial$29.991 Year

Questions

Is Astrospheric free?
Astrospheric is free to download, with in-app purchases available.
Is Sunbeam free?
Sunbeam is free to download, with in-app purchases available.
Which has better reviews, Astrospheric or Sunbeam?
Astrospheric is rated higher. Astrospheric averages 4.8 out of 5 from 453 ratings, while Sunbeam averages 4.7 from 1.7K ratings.
Do Astrospheric or Sunbeam have ads?
Neither Astrospheric nor Sunbeam shows ads.
Which is updated more often, Astrospheric or Sunbeam?
Astrospheric ships an update every 3 weeks, and Sunbeam every 4 weeks. Most recently, Astrospheric was updated on September 23, 2026 and Sunbeam on September 24, 2026.

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